Using a shield to assist swap of polarity in a magnet

[marianpiti]

A...one more small detail...try using round magnets (as I did) like tubes... because cuboids do have a bigger magnetic field power on the side...you know, the side power of field...in round magnets the side power is way much smaller, so you can turn it easyer that cuboids. And my sugestion is to take away the shielding. If you plan to use cuboids, try shield every magnet with soft iron...this will kill a little the side magnetic field...the shielding must be with 1-2 mm bigger than the size of the magnet. In that way, magnetic fields from every magnet will close the opposite pole thru the shield and the side force will be reduced.

[marianpiti]

Aaa...and you will have one more chalange 
How you plan to turn the magnets ? How are you planning to hold the part that will turn the magnets ? If you already have the solution, is good...if not... I will tell you after you boil a little 

[Low-Q]

A...one more small detail...try using round magnets (as I did) like tubes... because cuboids do have a bigger magnetic field power on the side...you know, the side power of field...in round magnets the side power is way much smaller, so you can turn it easyer that cuboids. And my sugestion is to take away the shielding. If you plan to use cuboids, try shield every magnet with soft iron...this will kill a little the side magnetic field...the shielding must be with 1-2 mm bigger than the size of the magnet. In that way, magnetic fields from every magnet will close the opposite pole thru the shield and the side force will be reduced.

I have lots of small round disc magnets which is magnetized through thickness. I will use them. I do not think the shape of the magnet are critical for this purpose, as a magnetic field in general will either resist or not the twist regardless of its shape. Also the magnetic foce at the edges in a square magnet are higher, as you said, this will also affect the attraction and repulsion with similar greater force before and after the shield. So basicly the shape shouldn't matter that much - in my opinion. Just an opinion

Another thing is that all magnets outside the shield are suppose to "power" the enterance and exit just as many times as the magnets which is attracting and repelling at any time. So the energy needed to pass through the shield would perhaps stop the rotation anyways. But this is what I want to test out in practice, just to be sure. At least, I will learn WHY it works or not

Vidar

[Blainiac]

Good luck Vidar!  I really enjoy your ideas, they are some of the most unique and well-thought of ideas I've seen.  It's also good you have an excellent grasp of the physics and can see if things will work or not.  Interesting idea!

[Low-Q]

Good luck Vidar!  I really enjoy your ideas, they are some of the most unique and well-thought of ideas I've seen.  It's also good you have an excellent grasp of the physics and can see if things will work or not.  Interesting idea!

Thanks for those encouraging words